Triumph Motorcycles has a history of fitting large engines to its motorcycles. The 2025 Rocket 3 Storm currently holds the production motorcycle displacement record with its 2,458 cc inline triple. But a decade ago, Triumph entered the American cruiser market with the Thunderbird. Competing against established brands like Harley-Davidson and Indian Motorcycle proved difficult, but the Thunderbird distinguished itself with the largest parallel-twin engine ever fitted to a production motorcycle.Parallel-twin engines typically power sport bikes, touring machines, and retro models such as the Yamaha YZF-R7, Suzuki V-Strom, and . Cruisers traditionally rely on V-twin configurations. Triumph challenged this convention by pairing cruiser styling with a 270-degree parallel-twin powerplant, combining V-twin-scale displacement with the smoothness and durability associated with parallel-twin designs.This examination explores how the British-built Thunderbird remains a compelling alternative to American cruisers. 2011-2018 Triumph Thunderbird Has The Biggest Parallel-Twin Triumph MotorcyclesTriumph launched the Thunderbird cruiser in 2009 with a 1,597 cc parallel-twin engine. American buyers responded positively, though the displacement trailed competitors. Harley-Davidson offered 1,690 cc V-twins while Indian reached 1,811 cc. Triumph responded with an enlarged 1,699 cc version for the Commander, LT, and Storm variants, keeping the smaller engine in the base model.Triumph MotorcyclesThe 270-degree firing order delivered efficiency and refinement uncommon in the cruiser segment, producing a distinctive exhaust note rather than traditional V-twin rumble. The Storm arrived first in 2011 with nearly 100 horsepower, followed by the Commander and touring-focused LT in 2014. Unlike typical cruiser powerplants, the Thunderbird's engine exhibited characteristics similar to the Bonneville, with peak torque at 3,550 rpm and maximum power at 5,400 rpm.Triumph Motorcycles Supporting hardware included a tubular steel twin-spine frame, twin-sided swingarm, 47 mm Showa forks, and rear shocks with adjustable preload. The complete package weighed less than comparable American cruisers, offering distinct handling characteristics. Despite initial success against established rivals, the Thunderbird eventually faded from the lineup. Today, the Rocket 3 continues this legacy of challenging convention with oversized British powerplants. Triumph Thunderbird: A Motorcycle Built For America Triumph Motorcycles Like the Bonneville, the Triumph Thunderbird nameplate has a rich and varied history. In fact, the name "Thunderbird" was derived from a "Thunderbird Motel" in South Carolina, where the Chief Designer of Triumph, Edward Turner, was staying during a tour of the USA. He designed the first-ever 650cc Triumph Thunderbird to meet the demands of an excellent and powerful motorcycle in America.The first-gen Triumph Thunderbird launched in 1949 and was an instant hit. This retro motorcycle's role in the 1950s movie The Wild One, starring Marlon Brando, was a major reason for its fame. His action-cut pieces atop the Thunderbird mesmerized everyone, hence the popularity of the original 6T Thunderbird.Triumph Motorcycles After the first-generation run ended in 1966, the Thunderbird took a 15-year hiatus. By the time it emerged in 1981 as the TR65 Thunderbird, the world had moved far ahead—so much so that the iconic 50s Triumph was now the most "outdated" in the Triumph line-up.But things took a bold turn in 1994 with the introduction of the Triumph Thunderbird 900. This time around, it was more of a charismatic cruiser with a low-slung design and touring-ready features, including a meaty 98 hp three-cylinder engine. Eventually, the revived Thunderbird morphed into a Harley and Indian rival with the 2011-2018 model line-up, packing the biggest production-spec parallel-twin motorcycle engine ever made.Triumph Motorcycles Throughout its evolution, this Triumph underwent many tweaks; it even transformed from a sporty classic roadster into a bulky mile-munching tourer. However, one aspect stayed constant throughout its journey – the Thunderbird was a motorcycle built for America. Why Was The Triumph Thunderbird Discontinued? Triumph Motorcycles Triumph wrapped things up on a high note with the 2018 Thunderbird Storm (its most powerful model ever). The motorcycle manufacturer never gave an official statement about why it pulled the plug on the Thunderbird, but there are various rumors floating around the internet.The most popular one is that of the EPA regulations. With emission rules becoming stringent over the years, it is suspected that the 1,699cc behemoth twin-cylinder was getting tougher to abide by the emission rules.Another major reason is that in the Triumph model line-up, the iconic Bonneville was positioned below the Thunderbird, and the monstrous Rocket 3 was positioned above it. We feel that both these machines were overshadowing the Thunderbird.Triumph Motorcycles The first-gen 1950s Thunderbird was what carried the nostalgic factor for Americans. But in the 2000s, the Bonneville was the nostalgia-inducing bike that reminded people of the original 6T rather than the cruiser with the gigantic parallel-twin engine. Talking of which, Triumph had the Rocket 3 at the extreme end of its arsenal. With a gigantic three-cylinder engine, this muscle cruiser was a force to be reckoned with.So, in short, both the Bonneville and the Rocket 3 shared the Thunderbird's essence and were doing a better job at it. How Much Does The Triumph Thunderbird Cruiser Cost Today? Used Price Range: $4,500 - $10,000 Triumph Motorcycles The Thunderbird 1700 is a rare find in the used motorcycle market. But this bulky Triumph is a sought-after cruiser today, especially since it is a famed and discontinued model.Triumph Motorcycles Scouting through listings on CycleTrader and AutoTrader shows us that the biggest parallel-twin motorcycle starts at around $5,000 used. For reference, the 2016 Triumph Thunderbird Storm had a starting MSRP of $15,250.